Navigator Ford Expedition Sub Enclosure Behind 3rd Row Subwoofer Speaker BoxThis Box will fit all Lincolns and Expedition behind the 3rd row Listing is for 4 12", ported and sprayed with truckbed liner Speaker mounting depth of 7. 5" (7 1 2") Box can also be made for 8", 10" round or square subs Dimensions: 48" wide x 17" high Dimensions can be adjusted to fit other vehicles upon request Can be made sealed Screw on speaker terminals included Box can be wrapped in carpet for $100 less There is about 2. 5 cuft of airspace per